What causes massive loss streaks? (no, not loser's queue)

Just wondering, like what goes on to cause these massive loss streaks, and yes, variance, blah blah blah - but I mean, it's not just variance. Occasional ones, sure. But to match my win/loss streak record it would be like flipping tails 10 times in a row, 3 times heads, and then another 10 tails... repeat... And I don't mean just my own win/loss - but like, what causes streaks, is it psychological, or mood, or what?